Frequencies for first 10,000 rows of drg4ing2 variable in nhamcsed1996 dataset : ingredient | code #2 for | drug #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,908 99.08 99.08 50530 | 1 0.01 99.09 50575 | 1 0.01 99.10 51340 | 11 0.11 99.21 51708 | 1 0.01 99.22 52023 | 1 0.01 99.23 52650 | 20 0.20 99.43 52720 | 4 0.04 99.47 53175 | 8 0.08 99.55 53280 | 1 0.01 99.56 53895 | 1 0.01 99.57 53970 | 1 0.01 99.58 54094 | 6 0.06 99.64 54455 | 4 0.04 99.68 54595 | 2 0.02 99.70 54890 | 8 0.08 99.78 54960 | 1 0.01 99.79 54990 | 3 0.03 99.82 55200 | 1 0.01 99.83 55521 | 3 0.03 99.86 55925 | 1 0.01 99.87 55997 | 8 0.08 99.95 56194 | 1 0.01 99.96 56355 | 1 0.01 99.97 57033 | 3 0.03 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016